:root {
  --bg: #fff7e6;
  --panel: rgba(255, 255, 255, 0.88);
  --ink: #1f2937;
  --muted: #5b6472;
  --line: rgba(120, 53, 15, 0.18);
  --saffron: #f59e0b;
  --saffron-dark: #b45309;
  --soft: #ffedd5;
  --code: #111827;
  --code-text: #f9fafb;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background:
    radial-gradient(circle at top right, rgba(251, 191, 36, 0.36), transparent 28rem),
    radial-gradient(circle at bottom left, rgba(251, 146, 60, 0.28), transparent 24rem),
    var(--bg);
  color: var(--ink);
  line-height: 1.65;
}

body.dark {
  --bg: #111827;
  --panel: rgba(31, 41, 55, 0.9);
  --ink: #f9fafb;
  --muted: #d1d5db;
  --line: rgba(255, 255, 255, 0.15);
  --soft: #3f2d12;
}

a { color: inherit; }

.hero {
  padding: 1rem clamp(1rem, 4vw, 4rem) 3rem;
}

.topbar {
  max-width: 1180px;
  margin: 0 auto 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  text-decoration: none;
  font-weight: 900;
  color: var(--saffron-dark);
  letter-spacing: 0.02em;
}

.nav-actions {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.small-btn,
.primary,
.secondary,
.copy,
.quiz button {
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 800;
}

.small-btn {
  padding: 0.65rem 0.9rem;
  background: var(--soft);
  color: var(--ink);
  border: 1px solid var(--line);
}

.hero-grid {
  max-width: 1180px;
  margin: auto;
  display: grid;
  grid-template-columns: 1fr minmax(280px, 520px);
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--soft);
  color: var(--saffron-dark);
  font-weight: 900;
}

h1 {
  font-size: clamp(2.4rem, 6vw, 5.8rem);
  line-height: 0.95;
  margin: 0.4rem 0 1rem;
}

.lead {
  font-size: clamp(1.05rem, 2.1vw, 1.35rem);
  color: var(--muted);
  max-width: 62ch;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.6rem;
}

.primary,
.secondary {
  display: inline-flex;
  text-decoration: none;
  padding: 0.9rem 1.25rem;
}

.primary {
  background: linear-gradient(135deg, #f59e0b, #fb923c);
  color: #111827;
  box-shadow: 0 16px 38px rgba(180, 83, 9, 0.24);
}

.secondary {
  background: var(--panel);
  border: 1px solid var(--line);
}

.shot-card {
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  background: var(--panel);
  box-shadow: 0 20px 70px rgba(120, 53, 15, 0.18);
}

.shot-card img {
  width: 100%;
  display: block;
  border-radius: 1rem;
  background: #111;
}

.shot-card figcaption {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 0.8rem;
}

main {
  max-width: 1180px;
  margin: auto;
  padding: 1rem clamp(1rem, 4vw, 2rem) 3rem;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 1.4rem;
}

.toc {
  position: sticky;
  top: 1rem;
  align-self: start;
  display: grid;
  gap: 0.45rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  background: var(--panel);
}

.toc a {
  text-decoration: none;
  color: var(--muted);
  padding: 0.35rem 0;
}

.toc a:hover { color: var(--saffron-dark); }

.content {
  display: grid;
  gap: 1.2rem;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 1.4rem;
  padding: clamp(1rem, 3vw, 2rem);
  box-shadow: 0 10px 40px rgba(120, 53, 15, 0.08);
}

.card h2 {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  margin-top: 0;
  color: var(--saffron-dark);
}

pre {
  position: relative;
  overflow: auto;
  background: var(--code);
  color: var(--code-text);
  padding: 1rem;
  border-radius: 1rem;
  border: 1px solid rgba(255,255,255,0.08);
}

code {
  font-family: Consolas, Monaco, "Courier New", monospace;
}

p code,
li code {
  background: var(--soft);
  padding: 0.1rem 0.35rem;
  border-radius: 0.35rem;
}

.copy {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  padding: 0.35rem 0.65rem;
  background: #fbbf24;
  color: #111827;
}

.compare,
.goodbad,
.flow {
  display: grid;
  gap: 1rem;
}

.compare,
.goodbad {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.compare > div,
.good,
.bad,
.node,
.checkpoint,
details {
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1rem;
  background: rgba(255, 237, 213, 0.45);
}

.good { border-color: rgba(22, 163, 74, 0.4); }
.bad { border-color: rgba(220, 38, 38, 0.4); }

.flow {
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  text-align: center;
}

.arrow {
  font-size: 2rem;
  color: var(--saffron-dark);
  font-weight: 900;
}

.checkpoint {
  margin-top: 1rem;
  font-weight: 800;
}

details {
  margin: 0.8rem 0;
}

summary {
  cursor: pointer;
  font-weight: 900;
}

.warning {
  border-left: 6px solid #ef4444;
  padding: 0.75rem 1rem;
  background: rgba(239, 68, 68, 0.08);
  border-radius: 0.6rem;
}

.quiz {
  display: grid;
  gap: 1rem;
  padding-left: 1.2rem;
}

.quiz button {
  margin: 0.2rem;
  padding: 0.65rem 1rem;
  background: var(--soft);
  color: var(--ink);
  border: 1px solid var(--line);
}

.quiz button.correct { background: #bbf7d0; color: #052e16; }
.quiz button.wrong { background: #fecaca; color: #450a0a; }

.result {
  font-weight: 900;
  color: var(--saffron-dark);
}

footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

@media (max-width: 900px) {
  .hero-grid,
  main,
  .compare,
  .goodbad,
  .flow {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }

  .arrow {
    transform: rotate(90deg);
  }
}